Transfer media



April 24, 1928. 1,667,689

w. F. GRUPE TRANSFER MEDIA Filed ua 24. 1926 Fig.1. I

ORNEY PatentedApr. 24,1928.

UNITED STATES wmmm r. entire. or LYNDEUBST,

. 1,667,689 PATENT OFFICE. 1

NEW JERSEY, ASSTGNOB 'I O. PEERLESS ROLL man (20., ma, YORK, N. Y., A. CORPORATION OF NEW YORK.

'IBLNBH'EB MEDIA;

Application filed Kay 24, 1928. Serial No. 111,170.

metals or with other ink impressions of desired colors, whereby the impression is:

aflixed substantially permanently to the material impressed. v

' Pursuant to my invention, synthetic resms v are admixed or combined with such metallic powder whereby under the stage'of transfer under elevated temperature by the use of a. heated die in a su'table' impression machine, the transferred portion of the transfer stri 90 is ailixed by a substantially permanent bon to the material impressed.

I refer a synthetic resin of the type of bake'te or similar condensation produced 0 aldehyde and phenol, and most referably. a 15 form of resin which is inactive c emically at ordinary temperatures but potentially active and converted at the heat transfer stage to its final form. Transfer media manufactured pursuant to tamin their stage of potential activity for an in efinite period, and are therefore not subject to deterioration by chemical or physical changes as is the case of transfer media of prior compositions.

Further features andobjects of the invention will be more fully understood from the following detail description and the accompanying drawings, in which Fig. 1 is a perspective view of a transfer medium embodying my invention, the respective layers being exaggerated in dimension and broken away to show the relationship of the same;

Fig. 2 is a similar view showing a modification; and

Fig. 3 is a similar view showing a further modification.

Referring to the form of my invention shown in Fig. 1, the strip 10 preferably of glassine paper serves as a transfer medium. On the paper carrier is first deposited a layer 11 of heat releasable medium, usually comprising beeswax and a 5 proportioned quantity of rosin or like resin invention possess the attribute of main-- attaining the carrier of the determined by the temperature of the transfer stage at which the release of the metallizin medium is desired and further determmed by the nature of shieldin effect relative to the impression performe by the heat releasable medium after the stage of transfer. 4, a On the layer 11 is then applied a layer 12 containing the metallic constituent usuall in the form of a highly comminuted metaf lic powder of bronze or aluminum, or alloy, in simulation of gold or-of silver or of platinum, as desired. With such metallic powder is admixed a synthetic resin such as a condensation product containing furfurol resin and phenol. Such admixture of metallic powder and synthetic resin may be sprayed on the layer 11 b means of a suita lecompressed air brus or the like; the furfurol condensation roduct is dissolved in a suitable vap'orizab e solvent such as alcohol, benzol or acetone. The mixture of furfurol or other condensation product of synthetic resin and phenol is chemicall inactive relative to the bronze powder and the like and also relative to beeswax-and rosin mixture but is potentially active and chemically effective upon attaining the desired temperature of activity, usually in the neighborhood of 270 F., to which temperature the heated die is re ulated in its temperature for esired fluidity and viscosity of the transferred portion of the transfer medium for deriving the desired nicet of impression at the speed of operation 0 the transfer.

It will be understood that my invention is of especial value for use in transfer feeding machines such Patent No. 1,526,209, 1925.

Such transfer medium is applicable for use for general metallizing transfer operations, the resulting outermost coating of the impression being formed of the resulting fluxed beeswax and rosin serving on the transfer strip as the heat releasable medium. The presence of the synthetic resin in the admixture of the layer 12 adds additional protectionto the metallic particles,'firstly,' in the stage of manufacture the metallic particles being coated by the synthetic resin which is substantially transparent and forms a protective film on the metallic particles and efdated February 10th,

as is disclosed in my U. S..

use, and, secondly, by the interfluxing of the synthetic resin with the constituents of the heat releasable medium in forming the ultimate protecting or shielding coating on the finished impression.

My invention is further exemplified in the form illustrated in Fig. 2 and comprising a carrier strip 10, preferably of glassine paper, on which is deposited a layer 11 of heat releasable composition, as aforesaid. The layer 12 corresponds to the layer 12 of metallic powder and admixed condensation product of synthetic resin described hereinabove relative to Fig. 1. On the outer face of the layer 12 is an outermost layer 13 of sizing which may be of a shellac for a soft sizing, or a varnish, such shellac orvarnish either alone or admixed with chalk, rice star'ch, bicarbonate of soda or the like acting as a filler, as set forth in U. S. Patent No. 1,515,676 and No. 1,515,722 both dated November 18th, 1924.

My invention is also utilizable as illustrated in Fig. 3 wherein the layer of a heat releasable medium of the aforesaid forms of my invention is omitted, that is to say, the layer 12 of metallic particles admixed with the condensation product of synthetic resin of an aldehyde and phenol is deposited directly on the carrier strip 10, preferably of glassine paper. The sizing 13 corresponds to that of the embodiment shown in Fig. 2.

The form of my invention of the type shown in Fig. 1 which does not embody an outermost sizing layer, is advantageous for use with goods which in the course of the manufacture of the goods are provided or finishedwith a sizing. The forms of my invention shown in Figs. 2 and 3 possess the attributes of formin a relatively hard and dry impression and are most effectively transferred under hi 'her temperatures of the die in the release of the metallizing medium to the goods impressed.

My preferred medium is particularly of 'value for impressing materials such as bakelite panels for radio cabinets, likewise panels of hard rubber and sheets of cork board, and also for impression and orname-ntin diaphragms of flexible cork material 0 cone speakers; however, my improved form of transfer medium is also applicable for use with silks, cloth and as well for paper.

Whereas I have described my invention by specification this reference to specific forms thereof it will be understood that many changes and modificatlons may be made without departing from the spirit of the invention.

I claim: 1. transfer medium, the combination of a carrier strlp and a layer of metallic powder admixed with a condensation product of aldehyde and phenol. v

2. transfer medium, the combination of a carrier strip and a layer of metallic powder admixed with a condensation )roduct of aldehyde and phenol and embo ying furfurol.

3. A transfer medium, the combination of a carrier. str1p, a layer of metallic powder admixed with a condensation product of aldehyde and phenol and a layer containing a resinous material serving as a sizing.

4. A transfer medium, the combination of a carrier strip, a la er of metallic powder admixed with a condensation product of aldehyde and phenol and a layer of resinous material serving as a heat releasable material in the transfer strip and as the sizing on the finished impression.

o. A heat releasable transfer strip comprising a carrier strip, a layer of heat releasable material containing resin and a layer embodying metallic particles admixed with a resinous material capable at the temperature of transfer of inter-fusing with the resinous material of said heat releasable layer to form a substantially clear sizing.

6. A heat releasable transfer strip comprising a carrier strip, a layer of heat releasable material containin resin and a layer embodying metallic particles admixed with a condensat1on product containing a synthetic resin capable at the temperature of transfer of interfusing with the resinous material of said heat releasable layer to form a substantially clear sizing of relatively great hardness at ordinary temperature.

7. In a transfer medium, the combination of a carrier strip and a layer of metallic powder admixed with a condensation product of aldehyde and phenol chemically inactive at ordinary temperatures for an indefinite period and potentially reactive at the temperature of the transfer stage.

In testimony whereof I have signed this 20th da of Ma 1926. WILLI M F. G UPE. 

